Date: Thu, 8 Jul 2004 04:28:55 -0700 (PDT) From: Gregg Eshelman <[EMAIL PROTECTED]>
The Classic is essentially a Mac Plus+. Same CPU, same video but better SCSI and 32bit clean ROM with
Picking nits here. The ROM in the Classic is not 32 bit clean because the Classic cannot support 32 bit addressing. This is not a software or firmware limitation, in the case of the Classic. The issue is that it uses the 68000 processor and the 68000 processor only has 24 address pins, hence 24 bit addressing--one bit per pin.
This is why the Mac OS started out as a 24 bit addressing operating system. The first Mac was based on the MC68000 processor which had 24 address bits.
When Apple built machines with the 68020 and 68030 processors, then they had 32 address bits available in the hardware, but it took them several models before they updated the firmware of new machines and the Mac OS to take advantage of it.
Jeff Walther
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